hello guys, my powersupply is working however it has a negative output. Once i power on my computer the fan of the processor works but the entire system won't work. When I checked the output of my powersupply it has negative outputs. How does it happen like this?. Any brilliant ideas how to get through with this problem. Thanks so much! Godspeed..
PSU got negative output!! help
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Re: PSU got negative output!! help
Originally posted by HarveyYou've got your leads plugged into your meter the wrong way around?Comment
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Re: PSU got negative output!! help
actually, what really happen was one of computer in the office suddenly shut off and when i turn it on the computer won't work. I checked this powersupply and i was amazed it got negative outputs, so i decided to replaced new powersupply to this computer and it was working fine. so basically, the problem was the powersupply with negative outputs.Last edited by jdimpas; 06-17-2008, 02:27 AM.Comment
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Re: PSU got negative output!! help
Originally posted by kc8adulooks like a harbor fright meter.bet it is backwards.
the psu in the pic is a gutless wonder.
experiment with it and toss it.not worth repairing and possibly not even safe to use.Comment
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Re: PSU got negative output!! help
I would chuck that supply as KC said thats one of those "lets see how many components we can remove until the PSU doesn't work anymore" supplies.
If it was a well designed supply then it would be worth it.
EMI filter don't need it safety caps don't need em.
A jumper wire works just as well NOT!!!
I really wonder how anyone with a conscience could design and sell a supply like this.
I can see the original designer silkscreened the safety components on the board but the beancounters started chopping parts out during the building process.
Look at those tiny descrete diodes for the line rectifier pathetic I'd love to draw the full rated 250 watts the thing would probably go up like a roman candle.
It doesn't look like it even uses an opto isolator they used a transformer for feedback isolation.Last edited by Krankshaft; 06-17-2008, 04:45 PM.Elements of the past and the future combining to make something not quite as good as either.Comment
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Re: PSU got negative output!! help
You have the meter leads in the wrong holes.
The bottom hole says "common" - that's ground - that where the black wire goes.
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